<!DOCTYPE html>
<html>
<head>
	<title></title>
	<meta charset="utf-8">
</head>
<body>
	<form action="" method='post'>
		<label>用户名</label>
		<input type='text' name='usr' value='hehe'><br>
		<label>密&nbsp;&nbsp;&nbsp;码</label>
		<input type='password' name='usr'><br>
		<select name='ss'>
			<option value='1'>第一项</option>
			<option value='2' selected>第二项</option>
			<option value='3'>第三项</option>
		</select>
		<input type='checkbox' name="aa[]">复选框1
		<input type='checkbox' name="aa[]" checked>复选框2
		<br>

		<input type='radio' name='rb'>单选框1
		<input type='radio' name='rb' checked>单选框2
		<input type='radio' name='rb'>单选框3
		<br>
		<input type='submit' value='提交'>
		<input type='reset' value='清除'>
	</form>
</body>
</html>